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Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler

From Christoph Hellwig <hch@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler
Date 2016-03-11 12:50 +0100
Message-ID <rbtJU-5CI-3@gated-at.bofh.it> (permalink)
References (5 earlier) <r91I5-1ID-11@gated-at.bofh.it> <r91RL-1Nv-3@gated-at.bofh.it> <r9jlD-62W-5@gated-at.bofh.it> <rbtgS-5hR-15@gated-at.bofh.it> <rbtqy-5pl-15@gated-at.bofh.it>
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On Fri, Mar 11, 2016 at 01:24:24PM +0200, Nikolay Borisov wrote:
> Out of curiosity - would it make sense to have something like BFQ/CFQ
> for single-queue blk-mq users?

The mess that CFQ is certainly not.  But we want to eventually be able
to get rid of the legacy request code, so we need suitable I/O
scheduling.  See the threads at: https://lkml.org/lkml/2015/11/19/227 or
http://thread.gmane.org/gmane.linux.scsi/111257/focus=111320 for more
details.  A leightweight bfq-like scheduler might come in handy on top
of Andreas' time slicing work.

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Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-03-04 18:30 +0100
  Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler Christoph Hellwig <hch@infradead.org> - 2016-03-04 18:40 +0100
    Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-03-04 19:20 +0100
      Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler Christoph Hellwig <hch@infradead.org> - 2016-03-11 12:20 +0100
        Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-03-11 14:50 +0100
    Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-03-05 13:20 +0100
      Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler Christoph Hellwig <hch@infradead.org> - 2016-03-11 12:20 +0100
        Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler Nikolay Borisov <kernel@kyup.com> - 2016-03-11 12:30 +0100
          Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O  scheduler Christoph Hellwig <hch@infradead.org> - 2016-03-11 12:50 +0100
        Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler Linus Walleij <linus.walleij@linaro.org> - 2016-03-11 16:00 +0100
    Re: [PATCH RFC 09/22] block, cfq: replace CFQ with the BFQ-v0 I/O scheduler Paolo Valente <paolo.valente@linaro.org> - 2016-03-09 08:00 +0100

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